On Wednesday, January 14, 2015 at 8:08:25 PM UTC-6, Felix.Frank wrote:
>
> On 01/14/2015 03:47 PM, Jason Wever wrote:
> > Hi All,
> >
> > I having a problem in where I'm defining a File Type and setting the
> > requires parameter to use a variable name (e.g. requires => $foo).
> > However, when I do this, the Puppet run doesn't act like it's
> > translating the variable into what it should be set to. $foo should
> > resolve to either Class['a'] or Class['b'] depending on a particular
> > fact, but the File Type is being processed by Puppet before Class['a']
> > or Class['b'] has been processed.
> >
> > Is it possible to use a variable as the value for the requires
> > parameter in a File Type?
> >
> > I've tried this with Puppet versions 3.5.1 and 3.6.1 but no change in
> > behavior. Haven't tried a 3.7.x.
> >
> > Thanks,
>
> Hi,
>
> this is not an ordering issue.
>
Perhaps not.
>
> $foo = 'Class["a"]'
>
> The above string is not blessed into a class reference when used as the
> value for an ensure parameter (apparently). Not quoting it makes no
> difference.
>
>
Are you sure that quoting vs. not quoting doesn't make a difference? At
least with the future parser, the unquoted version ought to be a bona fide
class reference in any context, and I didn't think that was new. Or are
you suggesting that the reference gets stringified upon assignment to a
variable? I've never done much along these lines, but that sounds
surprising and a bit inconsistent to me.
Or what about this:
$foo = [ Class['a'] ]
In any case, if $foo does not resolve to a class or resource reference,
then why does catalog building succeed? (Or perhaps the problem actually
manifests as catalog building failure....)
> This should work:
>
> $foo = "a"
>
> File["/path/to/file"] { require => Class[$foo] }
>
>
Yes, that should certainly work (provided that Class['a'] is declared for
the node). Depending on the availability of $foo, that approach might also
be taken in the original File declaration instead of being performed as an
override. In fact, if it cannot be performed in the initial declaration,
then it would be better to use the appropriate chain operator, to avoid the
possibility of overriding other relationships set via 'require':
Class[$foo] -> File['/path/to/file']
John
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